package com.nanako.controller;

import com.nanako.common.R;
import com.nanako.utils.OssUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Objects;
import java.util.UUID;

@RestController
@Slf4j
@RequestMapping("/common")
public class CommonController {

    @Autowired
    private OssUtils ossUtils;

    /**
     * 文件上传
     *
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R putFile(MultipartFile file) throws IOException {
        //file是一个临时文件，需要转存到指定位置，否则本次请求完成后临时文件会删除
        log.info(file.toString());

        //原始文件名
        String originalFilename = file.getOriginalFilename();//abc.jpg
        String suffix = Objects.requireNonNull(originalFilename)
                .substring(originalFilename.lastIndexOf("."));

        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID() + suffix;//dfsdfdfd.jpg
        ossUtils.upload(fileName, file.getInputStream());
        return R.success(fileName);
    }

    /**
     * 文件下载
     * @param name
     * @param response
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {
        ossUtils.download(name, response.getOutputStream());
    }

}
